operational vs military machine

operational is not a noun while military machine is a noun.

Word	Noun	Adjective	Verb	Adverb
operational	No	Yes	No	No
military machine	Yes	No	No	No

operational (noun)	military machine (noun)
	the military forces of a nation

operational (adjective)	military machine (adjective)
(military) of or intended for or involved in military operations
pertaining to a process or series of actions for achieving a result
being in effect or operation
fit or ready for use or service